Introduction to Windows Phone 7 Silverlight Development: Making an Off Line RSS Reader

<navigation:PhoneApplicationPage 
    x:Class="wp7RssReader.pgUpdateRss"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:navigation="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone.Controls.Navigation"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d" d:DesignHeight="800" d:DesignWidth="480"
    SupportedOrientations="Portrait"    
    ApplicationBar="{StaticResource MenuAppBar}" Loaded="PhoneApplicationPage_Loaded">

    <Grid x:Name="LayoutRoot"  Background="{StaticResource PhoneBackgroundBrush}">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

        <!--TitleGrid is the name of the application and page title-->
        <Grid x:Name="TitleGrid" Grid.Row="0" Background="#BB440099">
            <TextBlock Text="wp7 Rss Reader" x:Name="textBlockPageTitle" Style="{StaticResource PhoneTextPageTitle1Style}"/>
            <TextBlock Text="Update Rss" x:Name="textBlockListTitle" Style="{StaticResource PhoneTextPageTitle2Style}"/>
        </Grid>

        <!--ContentGrid is empty. Place new content here-->
        <Grid x:Name="ContentGrid" Grid.Row="1">
            <ListBox Name="lstItems" Margin="13,6,13,165"  Foreground="White" Background="#3B1D00FF" BorderBrush="#FF7100C2" SelectionMode="Multiple">
                <ListBox.ItemTemplate>
                    <DataTemplate>
                        <StackPanel HorizontalAlignment="Stretch" Width="420" Background="Transparent">
                            <Border CornerRadius="5" BorderBrush="Purple" BorderThickness="2" Background="#3B1D00FF" HorizontalAlignment="Stretch">
                                <Grid>
                                    <TextBlock Text="{Binding Description}" TextWrapping="Wrap" HorizontalAlignment="Stretch" Visibility="Visible">
                                    </TextBlock>                                    
                                </Grid>
                            </Border>
                        </StackPanel>
                    </DataTemplate>
                </ListBox.ItemTemplate>
            </ListBox>
            <Button Content="Update Selected Items" Height="70" HorizontalAlignment="Left" Margin="6,493,0,0" Name="button2" VerticalAlignment="Top" Width="468" Click="button2_Click"/>            
        </Grid>
    </Grid>
</navigation:PhoneApplicationPage>